keyword
MENU ▼
Read by QxMD icon Read
search

surfactant protein

keyword
https://www.readbyqxmd.com/read/29782985/facile-preparation-of-recombinant-spider-eggcase-silk-spheres-via-an-hfip-on-oil-approach
#1
Jianming Chen, Jinlian Hu, Peijun Zuo, Jingyu Shi, Mo Yang
Versatile spider silk proteins have been prepared by various methods in morphology of spheres for functional applications. Inspired from natural spinning process, a facile approach for the fabrication of silk spheres is described. Distinct from the traditional emulsification method, silk spheres were assembled as rapidly as 10 s by using the HFIP-on-Oil method without any surfactants and agitation used. Notably, a series of factors, such as evaporation rate of HFIP, polarity and molecular weight of oils play central roles on the final silk morphologies...
May 18, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29775706/purification-and-characterization-of-an-organic-solvent-tolerant-and-detergent-stable-lipase-from-haloferax-mediterranei-cncmm-50101
#2
Siham Akmoussi-Toumi, Souad Khemili-Talbi, Imen Ferioune, Salima Kebbouche-Gana
The present study investigates the purification and biochemical characterization of an extracellular lipase (HML) from Haloarchaea Haloferax mediterranei strain ATS1, isolated from the Sebkha (Medea, Algeria). The pure protein was obtained with ammonium sulfate precipitation (40-70%)-dialysis and UNO Q-6 FPLC, and characterized biochemically. Matrix assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF/MS) analysis revealed that the purified enzyme was a monomer, with a molecular mass of 45,011...
May 15, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29769460/circulating-surfactant-protein-d-is-associated-with-clinical-outcomes-in-peripheral-artery-disease-patients-following-endovascular-therapy
#3
Yoichiro Otaki, Tetsu Watanabe, Hiroki Takahashi, Takayuki Sugai, Miyuki Yokoyama, Satoshi Nishiyama, Takanori Arimoto, Tetsuro Shishido, Takuya Miyamoto, Tamon Yamanaka, Isao Kubota, Masafumi Watanabe
BACKGROUND: Peripheral artery disease (PAD) is a risk factor for the development of cardiovascular disease and death. Surfactant protein-D (SP-D) is a 43-kDa protein secreted from type II pneumocytes in the lungs. Recent studies have demonstrated that circulating SP-D plays a key role in the development of atherosclerosis and is related to clinical outcomes in patients with ischemic heart disease. However, it remains unclear whether circulating SP-D is associated with clinical outcomes in patients with PAD...
May 17, 2018: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29769321/lectin-mediated-binding-and-sialoglycans-of-porcine-surfactant-protein-d-synergistically-neutralize-influenza-a-virus
#4
Martin van Eijk, Michael J Rynkiewicz, Kshitij Khatri, Nancy Leymarie, Joseph Zaia, Mitchell R White, Kevan L Hartshorn, Tanya R Cafarella, Irma Van Die, Martin Hessing, Barbara A Seaton, Henk P Haagsman
Innate immunity is critical in the early containment of influenza A virus (IAV) infection, and surfactant protein D (SP-D) plays a crucial role in the pulmonary defense against IAV. In pigs, which are important intermediate hosts during the generation of pandemic IAVs, SP-D uses its unique carbohydrate recognition domain (CRD) to interact with IAV. An N-linked CRD-glycosylation provides interactions with the sialic acid binding site of IAV, and a tripeptide loop at the lectin binding site facilitates enhanced interactions with IAV glycans...
May 16, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29763900/c-prosp-b-a-possible-biomarker-for-pulmonary-diseases
#5
Nicolas Kahn, Anne-Kathrin Rossler, Katrin Hornemann, Thomas Muley, Ekkehard Grünig, Werner Schmidt, Felix J F Herth, Michael Kreuter
BACKGROUND: Detection of surfactant proteins A and D (SP-A and SP-D) in the serum of patients with pulmonary diseases is thought to reflect an injury of the alveolar epithelial barrier and as such serve as a biomarker for these diseases. However, the data for SP-B are limited. OBJECTIVES: The aim of this feasibility study was to assess whether immature SP-B pre-proteins might have value as a possible biomarker for pulmonary diseases. METHODS: In serum samples from patients with different chronic lung diseases (interstitial lung diseases [ILDs], chronic obstructive pulmonary disease, asthma, lung cancer, pulmonary hypertension, inflammation, patients on ventilator support; total n = 283), C-proSP-B was measured using an electrochemiluminescence immunoassay based on mouse monoclonal anti-C-proSP-B antibodies...
May 15, 2018: Respiration; International Review of Thoracic Diseases
https://www.readbyqxmd.com/read/29758541/molecular-interaction-studies-of-some-co-iii-surfactants-with-the-transport-protein
#6
Gopalaswamy Vignesh, Marimuthu Parthiban, Rajendran Senthilkumar, Sankaralingam Arunachalam
The present work describes the synthesis and the molecular interaction of two single-chain Co(III)-coordinated surfactant complexes with a plasma protein, human serum albumin by using various biophysical and in silico techniques. The experimental data reveals that like ordinary classical surfactants, our metallosurfactants also have the tendency to associate themselves and form micelles at critical micelle concentration. The thermodynamic parameters (ΔH°, ΔS°, and ΔG°) derived from the experiment demonstrates that the alkyl chain length and the head group of the Co(III)-surfactant complexes played a vital role in the binding process...
May 8, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29758468/overcoming-the-stability-solubility-and-extraction-challenges-in-reversed-phase-uhplc-ms-ms-bioanalysis-of-a-phosphate-drug-and-its-prodrug-in-blood-lysate
#7
Long Yuan, Shenita Basdeo, Qin C Ji
BMS-986104 is a S1P1 R modulator drug candidate under development and has been evaluated in Phase I clinical trials. BMS-986104 functions as a prodrug and undergoes enzymatic transformations in vivo to form the pharmacologically active phosphate drug, BMS-986104-P. Here, we report approaches to overcome the stability, solubility and extraction challenges in developing a sensitive, accurate and rugged LC-MS/MS method for the simultaneous quantification of the phosphate drug and its prodrug in blood lysate. An effective stabilization strategy using a cocktail of phosphatase and kinase inhibitors was developed to ensure the stability of both analytes during sample collection, storage, and processing...
May 5, 2018: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/29758307/lactoferrin-denaturation-induced-by-anionic-surfactants-the-role-of-the-ferric-ion-in-the-protein-stabilization
#8
Gabriel Max Dias Ferreira, Guilherme Max Dias Ferreira, Álvaro Javier Patiño Agudelo, Eliara Acipreste Hudson, Ana Clarissa Dos Santos Pires, Luis Henrique Mendes da Silva
Here, investigation was made of the interaction between Lactoferrin (Lf) and the anionic surfactants sodium dodecyl sulfate (SDS), sodium dodecylbenzene sulfonate (SDBS), and sodium decyl sulfate (DSS), using isothermal titration calorimetry, Nano differential scanning calorimetry (NanoDSC), and fluorescence spectroscopy. The Lf-surfactant interaction was enthalpically favorable (the integral enthalpy change ranged from -5.99 kJ mol-1 , for SDS at pH 3.0, to -0.61 kJ mol-1 , for DSS at pH 12.0) and promoted denaturation of the protein...
May 11, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29757121/management-of-electrolyte-disorders-also-the-method-matters
#9
Joris Richard Delanghe
INTRODUCTION: For the last few decades, electrolyte determinations in plasma or serum are carried out by reliable potentiometric methods. In recent years, a marked technical evolution has taken place, where the clinical analysis of common analytes (e.g. electrolytes) is partly moving from centralised clinical core laboratories to near-patient point-of-care testing. METHODS: As the measuring principle used by point-of-care testing markedly differs from the one used in core laboratories, sodium results are not always interchangeable in critically ill patients due to the different sensitivity of the analytical methods for the electrolyte exclusion effect...
May 14, 2018: Acta Clinica Belgica
https://www.readbyqxmd.com/read/29753012/significant-improvement-of-the-nitrilase-activity-by-semi-rational-protein-engineering-and-its-application-in-the-production-of-iminodiacetic-acid
#10
Zhi-Qiang Liu, Ming-Ming Lu, Xin-Hong Zhang, Feng Cheng, Jian-Miao Xu, Ya-Ping Xue, Li-Qun Jin, Yuan-Shan Wang, Yu-Guo Zheng
Iminodiacetic acid (IDA) is widely used as an intermediate in the manufacturing of chelating agents, glyphosate herbicides and surfactants. To improve activity and tolerance to the substrate for IDA production, Acidovorax facilis nitrilase was selected for further modification by the gene site saturation mutagenesis method. After screened by a two-step screening method, the best mutant (Mut-F168V/T201N/S192F/M191T/F192S) was selected. Compared to the wild-type nitrilase, Mut-F168V/T201N/S192F/M191T/F192S showed 136% improvement in specific activity...
May 9, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29750051/angiotensin-ii-type-2-receptor-agonist-compound-21-attenuates-pulmonary-inflammation-in-a-model-of-acute-lung-injury
#11
Mario Menk, Jan Adriaan Graw, Clarissa von Haefen, Hendrik Steinkraus, Burkhard Lachmann, Claudia D Spies, David Schwaiberger
Purpose: Although the role of the angiotensin II type 2 (AT2) receptor in acute lung injury is not yet completely understood, a protective role of this receptor subtype has been suggested. We hypothesized that, in a rodent model of acute lung injury, stimulation of the AT2 receptor with the direct agonist Compound 21 (C21) might have a beneficial effect on pulmonary inflammation and might improve pulmonary gas exchange. Materials and methods: Male adult rats were divided into a treatment group that received pulmonary lavage followed by mechanical ventilation (LAV, n=9), a group receiving pulmonary lavage, mechanical ventilation, and direct stimulation of the AT2 receptor with C21 (LAV+C21, n=9), and a control group that received mechanical ventilation only (control, n=9)...
2018: Journal of Inflammation Research
https://www.readbyqxmd.com/read/29749501/placental-protein-14-as-a-potential-biomarker-for-diagnosis-of-preterm-premature-rupture-of-membranes
#12
Yanyun Wang, Haibo Luo, Guanglu Che, Yanqin Li, Jun Gao, Qiongli Yang, Bin Zhou, Linbo Gao, Tao Wang, Yujie Liang, Lin Zhang
Premature rupture of membranes (PROM) is a common pregnancy complication that frequently results in maternal and perinatal morbidity. The present methods for diagnosing PROM do not satisfy clinical requirements. The present study aimed to examine the proteome profile of amniotic fluid (AF) and maternal plasma, screen unique proteins in AF, and evaluate their diagnostic value for diagnosing PROM. The proteome profiles of AF and maternal plasma were examined via liquid chromatography coupled with tandem mass spectrometry‑based proteomic techniques...
May 3, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29747649/effects-and-molecular-mechanisms-of-intrauterine-infection-inflammation-on-lung-development
#13
Jiarong Pan, Canyang Zhan, Tianming Yuan, Weiyan Wang, Ying Shen, Yi Sun, Tai Wu, Weizhong Gu, Lihua Chen, Huimin Yu
BACKGROUND: Intrauterine infection/inflammation plays an important role in the development of lung injury and bronchopulmonary dysplasia (BPD) in preterm infants, While a multifactorial genesis is likely, mechanisms involved in BPD after intrauterine infection/inflammation are largely unknown. Recent studies have suggested microRNAs (miRNAs) are likely to play a role. Therefore, this study aimed to study the effects and mechanisms of intrauterine infection/inflammation on lung development, and to identify miRNAs related to lung injury and BPD...
May 10, 2018: Respiratory Research
https://www.readbyqxmd.com/read/29737890/formulation-and-evaluation-of-carrot-seed-oil-based-cosmetic-emulsions
#14
Shalini Singh, Alka Lohani, Arun Kumar Mishra, Anurag Verma
The present study deals with the evaluation of antiaging potential of carrot seed oil-based cosmetic emulsions. Briefly, cosmetic emulsions composed of carrot seed oil in varying proportions (2, 4, and 6% w/v) were prepared using the hydrophile-lipophile balance (HLB) technique. Coconut oil, nonionic surfactants (Tween 80 and Span 80), and xanthan gum were used as the oil phase, emulgent, and emulsion stabilizer, respectively. The formed emulsions were evaluated for various physical, chemical, and biochemical parameters such as the zeta potential, globule size measurement, antioxidant activity, sun protection factor (SPF), skin irritation, and biochemical studies...
May 8, 2018: Journal of Cosmetic and Laser Therapy: Official Publication of the European Society for Laser Dermatology
https://www.readbyqxmd.com/read/29735089/influence-of-surfactants-and-proteins-on-the-properties-of-wet-edible-calcium-alginate-meat-coatings
#15
J Comaposada, B Marcos, R Bou, P Gou
Calcium alginate structures are of interest as replacers for natural casings due to their high availability, biodegradability and low price. The aim of this paper is to study the effect of oil, surfactants and proteins (pea and collagen) on the water transfer, mechanical and microstructural properties of the wet calcium alginate films. The addition of oil and surfactants tended to reduce the water permeance and the weight loss rate, reaching values between those shown by natural and collagen artificial casings...
June 2018: Food Research International
https://www.readbyqxmd.com/read/29733456/oxidative-damage-of-sp-d-abolishes-control-of-eosinophil-extracellular-dna-trap-formation
#16
Shida Yousefi, Satish K Sharma, Darko Stojkov, Nina Germic, Salome Aeschlimann, Moyar Q Ge, Cameron H Flayer, Erik D Larson, Imre G Redai, Suhong Zhang, Cynthia J Koziol-White, Katalin Karikó, Hans-Uwe Simon, Angela Haczku
The asthmatic airways are highly susceptible to inflammatory injury by air pollutants such as ozone (O3 ), characterized by enhanced activation of eosinophilic granulocytes and a failure of immune protective mechanisms. Eosinophil activation during asthma exacerbation contributes to the proinflammatory oxidative stress by high levels of nitric oxide (NO) production and extracellular DNA release. Surfactant protein-D (SP-D), an epithelial cell product of the airways, is a critical immune regulatory molecule with a multimeric structure susceptible to oxidative modifications...
May 7, 2018: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/29731780/lung-mesenchymal-stem-cells-ameliorate-elastase-induced-damage-in-an-animal-model-of-emphysema
#17
Donato Cappetta, Antonella De Angelis, Giuseppe Spaziano, Gioia Tartaglione, Elena Piegari, Grazia Esposito, Loreta Pia Ciuffreda, Angela Liparulo, Manuela Sgambato, Teresa Palmira Russo, Francesco Rossi, Liberato Berrino, Konrad Urbanek, Bruno D'Agostino
Pulmonary emphysema is a respiratory condition characterized by alveolar destruction that leads to airflow limitation and reduced lung function. Although with extensive research, the pathophysiology of emphysema is poorly understood and effective treatments are still missing. Evidence suggests that mesenchymal stem cells (MSCs) possess the ability to engraft the injured tissues and induce repair via a paracrine effect. Thus, the aim of this study was to test the effects of the intratracheal administration of lung-derived mouse MSCs in a model of elastase-induced emphysema...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29731110/engineered-nanomaterials-growth-control-by-monomers-and-micelles-from-surfactants-to-surface-active-polymers
#18
REVIEW
Mandeep Singh Bakshi
In pseudo-micellar phase, the crystal growth is primarily achieved by the surface activity of the monomers in the presence of micelles. To ensure the maximum potential of surface activity of monomers in morphology control, a micellar phase is required. This account specifically focuses on the crystal growth control by the surface active monomers of conventional surfactants and that of water soluble polymers. It also distinguishes the mechanisms involved in the shape control driven by the micellar phase of micelle forming polymers, their role as nanoreactors, micellar stability, and micellar transitions from the monomeric phase...
April 27, 2018: Advances in Colloid and Interface Science
https://www.readbyqxmd.com/read/29726688/influence-of-surfactant-structure-on-photoluminescent-%C3%AF-conjugated-polymer-nanoparticles-interfacial-properties-and-protein-binding
#19
Laura Urbano, Luke Ashley Clifton, Hoi Ki Ku, Hannah Kendall-Troughton, Kalliopi-Kelli A Vandera, Bruno F E Matarèse, Thais Fedatto Abelha, Peixun Li, Tejal A Desai, Cecile A Dreiss, Robert David Barker, Mark A Green, Lea Ann Dailey, Richard D Harvey
Π-conjugated polymer nanoparticles (CPNs) are under investigation as photoluminescent agents for diagnostics and bioimaging. To determine whether the choice of surfactant can improve CPN properties and prevent protein adsorption, five non-ionic polyethylene glycol alkyl ether surfactants were used to produce CPNs from three representative π-conjugated polymers. The surfactant structure did not influence size or yield, which were dependent on the nature of the conjugated polymer. Hydrophobic interaction chromatography, contact angle, quartz crystal microbalance and neutron reflectivity studies were used to assess the affinity of the surfactant to the conjugated polymer surface, and indicated that all surfactants were displaced by the addition of a model serum protein...
May 4, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29724643/adsorption-of-polysorbate-20-and-proteins-on-hydrophobic-polystyrene-surfaces-studied-by-neutron-reflectometry
#20
Zhenhuan Zhang, Sara Orski, Ann Marie Woys, Guangcui Yuan, Isidro E Zarraga, Norman J Wagner, Yun Liu
Understanding the adsorption of protein and surfactant molecules on hydrophobic surfaces is very important for storage stability and delivery of pharmaceutical liquid formulations as many commonly-used devices, such as drug containers and syringes, have hydrophobic surfaces. Neutron reflectometry is used here to investigate the structure information of the adsorption process of non-ionic surfactant (polysorbate 20) and proteins (monoclonal antibody (mAb) and lysozyme) on polystyrene surfaces. Thickness of adsorbed polysorbate 20 thin film is observed to be ≈21 Å, comparable to the radius of gyration of polysorbate 20 micelles in solution...
April 21, 2018: Colloids and Surfaces. B, Biointerfaces
keyword
keyword
40087
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"